linux-kernel - Re: [PATCH v2 2/3] PCI/MSI/Armada-370-xp: Remove arch_msi_check

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Date:	Mon, 8 Sep 2014 07:16:56 -0400
From:	Jason Cooper <jason@...edaemon.net>
To:	Alexander Gordeev <agordeev@...hat.com>,
	Thomas Petazzoni <thomas.petazzoni@...e-electrons.com>,
	Gregory CLEMENT <gregory.clement@...e-electrons.com>,
	Ezequiel Garcia <ezequiel.garcia@...e-electrons.com>
Cc:	linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH v2 2/3] PCI/MSI/Armada-370-xp: Remove
 arch_msi_check_device()

+ free-electron's guys.

On Sun, Sep 07, 2014 at 08:57:54PM +0200, Alexander Gordeev wrote:
> Moving MSI checks from arch_msi_check_device() function to
> arch_setup_msi_irqs() function makes code more compact and
> allows removing unnecessary hook arch_msi_check_device()
> from generic MSI code.
> 
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Jason Cooper <jason@...edaemon.net>
> Cc: linux-pci@...r.kernel.org
> Signed-off-by: Alexander Gordeev <agordeev@...hat.com>
> ---
>  drivers/irqchip/irq-armada-370-xp.c | 14 ++++----------
>  1 file changed, 4 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/irqchip/irq-armada-370-xp.c b/drivers/irqchip/irq-armada-370-xp.c
> index 574aba0..df60eab 100644
> --- a/drivers/irqchip/irq-armada-370-xp.c
> +++ b/drivers/irqchip/irq-armada-370-xp.c
> @@ -136,6 +136,10 @@ static int armada_370_xp_setup_msi_irq(struct msi_chip *chip,
>  	struct msi_msg msg;
>  	int virq, hwirq;
>  
> +	/* We support MSI, but not MSI-X */
> +	if (desc->msi_attrib.is_msix)
> +		return -EINVAL;
> +
>  	hwirq = armada_370_xp_alloc_msi();
>  	if (hwirq < 0)
>  		return hwirq;
> @@ -166,15 +170,6 @@ static void armada_370_xp_teardown_msi_irq(struct msi_chip *chip,
>  	armada_370_xp_free_msi(hwirq);
>  }
>  
> -static int armada_370_xp_check_msi_device(struct msi_chip *chip, struct pci_dev *dev,
> -					  int nvec, int type)
> -{
> -	/* We support MSI, but not MSI-X */
> -	if (type == PCI_CAP_ID_MSI)
> -		return 0;
> -	return -EINVAL;
> -}
> -
>  static struct irq_chip armada_370_xp_msi_irq_chip = {
>  	.name = "armada_370_xp_msi_irq",
>  	.irq_enable = unmask_msi_irq,
> @@ -213,7 +208,6 @@ static int armada_370_xp_msi_init(struct device_node *node,
>  
>  	msi_chip->setup_irq = armada_370_xp_setup_msi_irq;
>  	msi_chip->teardown_irq = armada_370_xp_teardown_msi_irq;
> -	msi_chip->check_device = armada_370_xp_check_msi_device;
>  	msi_chip->of_node = node;
>  
>  	armada_370_xp_msi_domain =
> -- 
> 1.9.3
> 
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